Posted: September 14th, 2017

Lifting Equation

Lifting Equation
For each of these situations, first calculate the RWL and LI, make suggestions
recalculate the L1, and finally comment on the safety of the task (is it safe for nearly
anyone, or would you recommend restrictions for some people?)
1. Lift from pallet on floor to conveyor belt 32″ high at 90 degrees. Canons weigh 20#.
Average 5 lifts/min. Assume 1.5 hours duration once in morning and once in afternoon.
Efrton has handles. Find RWL and LI and make a recommendation. Then recalculate the
V l-* 6” D = 32” H = 12″ A = 20 degrees
R°°L= LC >*~HMxVM?DM><AMr FM ><CM
C,fI3 (-$537 (. .32.) (. my )(_ 7l)(.60.) Lt) :- D. f?“ I/o5~
LI; .:..E_. __ I win 10 -at -?.2 23.02 :55‘
use ~35 .-..-~- :. 3736“? V; 6 = I?»
1 3 .02
2. Move from conveyor 42″ to shelf 30″. LIM = 5.0. 7 hours duration. Cartons weigh
12 1b., flimsy. Find RWL and LI and make recommendation. Then recalculate the L1.
H =18” V = 48” D = -18” A = 30 degrees
3. Load parts into carton. Parts weigh 30 lb. each. V = 42″ D = -18″ H = 10″ L/M
3.0 A = 45 degrees Duration = 2.5 hrs.
Make recommendation based RWL. Be specific.
4. Flour is bagged from a hopper bin into 50 lb. bags autornatiicalg. A worlzeéitfélgges
the bags from a floor conveyor and hand stacks them 0: a pal kg. 2 lcinggitilfi the morning
bags per minute and the workers rotate every hour, 630 Wo1‘ 8 0
and 2 hours in the afternoon at the ggcatton.
H=8 V=32D-=10 A:
Find RWL and LI make specific recommendations. Then recalculate the L1.

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